Know the reason Behind why we sleep?

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As we know that adequate and timely sleep is very important for human body like food, air and water to recover and function properly. Generally, 3 out of 4 people spend their one-third of the lives sleeping. Sleep is in fact the state of inactivity and muscular relaxation when normal stimuli as the touch of the hand or the sound produce no cognizant reaction. It is the recurring state of inactivity decrease of consciousness and decrease in responsiveness to events in the environment. A sleeping person is unaware of the hell going around him. But at this state also some of his reflexes are still active. That is why, sleeplessness leaves the person mentally, emotionally and physically weak.

Sleep involves four stages. For the first ten minutes or so after the person falls asleep he continues to be aware of his surroundings and is still awake. In this stage the mind begins to wander over events of the day that require no great concentration {I generally use high pillow to fall asleep and listen to the FM radio and I get asleep quick, leaving the FM shouting in my Cell Phone}. If a mere mentioning of his name takes place then it wakes up him during this prelude to deep sleep. When he initiates to drift into stage two, he is unable to see even if he sleeps with his eyes open ‘like fish’. The eyeballs move from side to side slowly. Mental images bearing little relation to each other may flash through the mind. He becomes moody at this stage, ‘cause his thinking becomes dynamic. It is not difficult to arouse a person from stage two sleeps. It continues within him for about 20-30 minutes if undisturbed. The temperature and the blood pressure drop even further and the sleeper is almost relaxed at the stage three. Restless sleepers do their tossing and talkers do their muttering at this time. It is often dreamed at this stage. But it might be forgotten by them when shaken awake. Stage two dreamers, who are easy to stimulate, often recall a dream in dramatic facet.

When the sleeper reaches the final quarter of his sleep, it is called delta sleep which lasts for about 20 minutes and represents the total relaxation and loss of conscience. This is the time when people walk in their sleep and wet their beds. A night’s sleep actually consists of four or five cycles of movement from stage four up to stage two and back to stage four.